bike geometry
Roubaix SL8 2026
Compare size-specific bike geometry, including reach, stack, angles, wheelbase and the measurements that influence fit and handling.
Specialized › Roubaix SL8 › Standard › Roubaix SL8
Roubaix SL8 geometry measurements
Choose the recorded size and configuration. Geometry figures can change by size; RideDNA does not collapse those values into one misleading answer.
What is the reach of the Roubaix SL8?
Reach is the horizontal distance from the bottom bracket to the top of the head tube. Also searched as frame reach.
| Configuration | Size | Reach | Source |
|---|---|---|---|
| Roubaix SL8 geometry | 54 | 396 mm | RideDNA-derived |
| Roubaix SL8 geometry | 61 | 417 mm | RideDNA-derived |
| Roubaix SL8 geometry | 52 | 385.3 mm | RideDNA-derived |
| Roubaix SL8 geometry | 56 | 404.1 mm | RideDNA-derived |
| Roubaix SL8 geometry | 44 | 369.9 mm | RideDNA-derived |
| Roubaix SL8 geometry | 49 | 379 mm | RideDNA-derived |
| Roubaix SL8 geometry | 58 | 411.1 mm | RideDNA-derived |
What is the stack of the Roubaix SL8?
Stack is the vertical distance from the bottom bracket to the top of the head tube. Also searched as frame stack.
| Configuration | Size | Stack | Source |
|---|---|---|---|
| Roubaix SL8 geometry | 54 | 537.2 mm | RideDNA-derived |
| Roubaix SL8 geometry | 61 | 617.9 mm | RideDNA-derived |
| Roubaix SL8 geometry | 52 | 518.7 mm | RideDNA-derived |
| Roubaix SL8 geometry | 56 | 556.8 mm | RideDNA-derived |
| Roubaix SL8 geometry | 44 | 496.6 mm | RideDNA-derived |
| Roubaix SL8 geometry | 49 | 502 mm | RideDNA-derived |
| Roubaix SL8 geometry | 58 | 583.5 mm | RideDNA-derived |
What is the effective top tube of the Roubaix SL8?
Effective top tube is the horizontal distance between the head-tube and seat-tube centerlines. Also searched as ETT, virtual top tube, horizontal top tube.
| Configuration | Size | Effective top tube | Source |
|---|---|---|---|
| Roubaix SL8 geometry | 54 | 550 mm | RideDNA-derived |
| Roubaix SL8 geometry | 61 | 600 mm | RideDNA-derived |
| Roubaix SL8 geometry | 52 | 534 mm | RideDNA-derived |
| Roubaix SL8 geometry | 56 | 569 mm | RideDNA-derived |
| Roubaix SL8 geometry | 44 | 503 mm | RideDNA-derived |
| Roubaix SL8 geometry | 49 | 523 mm | RideDNA-derived |
| Roubaix SL8 geometry | 58 | 584 mm | RideDNA-derived |
What is the head tube angle of the Roubaix SL8?
Head tube angle describes the steering-axis angle relative to the ground. Also searched as HTA, head angle, steering angle.
| Configuration | Size | Head tube angle | Source |
|---|---|---|---|
| Roubaix SL8 geometry | 54 | 72.3 ° | RideDNA-derived |
| Roubaix SL8 geometry | 61 | 73.5 ° | RideDNA-derived |
| Roubaix SL8 geometry | 52 | 71.5 ° | RideDNA-derived |
| Roubaix SL8 geometry | 56 | 73 ° | RideDNA-derived |
| Roubaix SL8 geometry | 44 | 69.3 ° | RideDNA-derived |
| Roubaix SL8 geometry | 49 | 70.8 ° | RideDNA-derived |
| Roubaix SL8 geometry | 58 | 73 ° | RideDNA-derived |
What is the seat tube angle of the Roubaix SL8?
Seat tube angle describes the seat-tube angle relative to the ground. Also searched as STA, seat angle, effective seat angle.
| Configuration | Size | Seat tube angle | Source |
|---|---|---|---|
| Roubaix SL8 geometry | 54 | 74 ° | RideDNA-derived |
| Roubaix SL8 geometry | 61 | 73.5 ° | RideDNA-derived |
| Roubaix SL8 geometry | 52 | 74 ° | RideDNA-derived |
| Roubaix SL8 geometry | 56 | 73.5 ° | RideDNA-derived |
| Roubaix SL8 geometry | 44 | 75 ° | RideDNA-derived |
| Roubaix SL8 geometry | 49 | 74 ° | RideDNA-derived |
| Roubaix SL8 geometry | 58 | 73.5 ° | RideDNA-derived |
What is the wheelbase of the Roubaix SL8?
Wheelbase is the distance between the front and rear wheel axles. Also searched as axle-to-axle length.
| Configuration | Size | Wheelbase | Source |
|---|---|---|---|
| Roubaix SL8 geometry | 54 | 1004.5 mm | RideDNA-derived |
| Roubaix SL8 geometry | 61 | 1041.7 mm | RideDNA-derived |
| Roubaix SL8 geometry | 52 | 989.3 mm | RideDNA-derived |
| Roubaix SL8 geometry | 56 | 1012.3 mm | RideDNA-derived |
| Roubaix SL8 geometry | 44 | 993.2 mm | RideDNA-derived |
| Roubaix SL8 geometry | 49 | 991.3 mm | RideDNA-derived |
| Roubaix SL8 geometry | 58 | 1030.6 mm | RideDNA-derived |
What is the chainstay length of the Roubaix SL8?
Chainstay length, also called rear center, is the distance from the bottom bracket to the rear axle. Also searched as Chainstay, rear center, rear centre.
| Configuration | Size | Chainstay length | Source |
|---|---|---|---|
| Roubaix SL8 geometry | 54 | 412.7 mm | RideDNA-derived |
| Roubaix SL8 geometry | 61 | 415.7 mm | RideDNA-derived |
| Roubaix SL8 geometry | 52 | 410.3 mm | RideDNA-derived |
| Roubaix SL8 geometry | 56 | 412.7 mm | RideDNA-derived |
| Roubaix SL8 geometry | 44 | 410.3 mm | RideDNA-derived |
| Roubaix SL8 geometry | 49 | 410.3 mm | RideDNA-derived |
| Roubaix SL8 geometry | 58 | 415.7 mm | RideDNA-derived |
What is the bottom bracket height of the Roubaix SL8?
Bottom bracket height is the vertical distance from the ground to the bottom bracket. Also searched as BB height.
| Configuration | Size | Bottom bracket height | Source |
|---|---|---|---|
| Roubaix SL8 geometry | 54 | 265 mm | RideDNA-derived |
| Roubaix SL8 geometry | 61 | 265 mm | RideDNA-derived |
| Roubaix SL8 geometry | 52 | 263 mm | RideDNA-derived |
| Roubaix SL8 geometry | 56 | 265 mm | RideDNA-derived |
| Roubaix SL8 geometry | 44 | 263 mm | RideDNA-derived |
| Roubaix SL8 geometry | 49 | 263 mm | RideDNA-derived |
| Roubaix SL8 geometry | 58 | 265 mm | RideDNA-derived |
What is the front center of the Roubaix SL8?
Front center is the distance from the bottom bracket to the front wheel axle. Also searched as front centre.
| Configuration | Size | Front center | Source |
|---|---|---|---|
| Roubaix SL8 geometry | 54 | 597 mm | RideDNA-derived |
| Roubaix SL8 geometry | 61 | 630.8 mm | RideDNA-derived |
| Roubaix SL8 geometry | 52 | 592.3 mm | RideDNA-derived |
| Roubaix SL8 geometry | 56 | 604.7 mm | RideDNA-derived |
| Roubaix SL8 geometry | 44 | 588.4 mm | RideDNA-derived |
| Roubaix SL8 geometry | 49 | 586.6 mm | RideDNA-derived |
| Roubaix SL8 geometry | 58 | 619.8 mm | RideDNA-derived |
What is the fork offset of the Roubaix SL8?
Fork offset is the perpendicular distance between the steering axis and the front axle. Also searched as fork rake, rake.
| Configuration | Size | Fork offset | Source |
|---|---|---|---|
| Roubaix SL8 geometry | 54 | 47 mm | RideDNA-derived |
| Roubaix SL8 geometry | 61 | 47 mm | RideDNA-derived |
| Roubaix SL8 geometry | 52 | 52 mm | RideDNA-derived |
| Roubaix SL8 geometry | 56 | 47 mm | RideDNA-derived |
| Roubaix SL8 geometry | 44 | 52 mm | RideDNA-derived |
| Roubaix SL8 geometry | 49 | 52 mm | RideDNA-derived |
| Roubaix SL8 geometry | 58 | 47 mm | RideDNA-derived |
What is the head tube length of the Roubaix SL8?
Head tube length is the measured length of the frame's head tube. Also searched as Head tube, head tube.
| Configuration | Size | Head tube length | Source |
|---|---|---|---|
| Roubaix SL8 geometry | 54 | 122 mm | RideDNA-derived |
| Roubaix SL8 geometry | 61 | 202 mm | RideDNA-derived |
| Roubaix SL8 geometry | 52 | 105 mm | RideDNA-derived |
| Roubaix SL8 geometry | 56 | 140 mm | RideDNA-derived |
| Roubaix SL8 geometry | 44 | 90 mm | RideDNA-derived |
| Roubaix SL8 geometry | 49 | 90 mm | RideDNA-derived |
| Roubaix SL8 geometry | 58 | 168 mm | RideDNA-derived |
What is the seat tube length of the Roubaix SL8?
Seat tube length is the recorded length of the frame's seat tube; measurement conventions can differ by manufacturer. Also searched as Seat tube, seat tube, frame size.
| Configuration | Size | Seat tube length | Source |
|---|---|---|---|
| Roubaix SL8 geometry | 54 | 465 mm | RideDNA-derived |
| Roubaix SL8 geometry | 61 | 545 mm | RideDNA-derived |
| Roubaix SL8 geometry | 52 | 445 mm | RideDNA-derived |
| Roubaix SL8 geometry | 56 | 485 mm | RideDNA-derived |
| Roubaix SL8 geometry | 44 | 365 mm | RideDNA-derived |
| Roubaix SL8 geometry | 49 | 410 mm | RideDNA-derived |
| Roubaix SL8 geometry | 58 | 505 mm | RideDNA-derived |
What is the standover height of the Roubaix SL8?
Standover height is the ground-to-top-tube height at the manufacturer's stated measurement point. Also searched as Standover, stand over height, standover clearance.
| Configuration | Size | Standover height | Source |
|---|---|---|---|
| Roubaix SL8 geometry | 54 | 730.7 mm | RideDNA-derived |
| Roubaix SL8 geometry | 61 | 808.9 mm | RideDNA-derived |
| Roubaix SL8 geometry | 52 | 709.8 mm | RideDNA-derived |
| Roubaix SL8 geometry | 56 | 749.5 mm | RideDNA-derived |
| Roubaix SL8 geometry | 44 | 661 mm | RideDNA-derived |
| Roubaix SL8 geometry | 49 | 684.6 mm | RideDNA-derived |
| Roubaix SL8 geometry | 58 | 772.5 mm | RideDNA-derived |
What is the fork length of the Roubaix SL8?
Fork length is the axle-to-crown distance recorded for the fork. Also searched as axle to crown, A2C.
| Configuration | Size | Fork length | Source |
|---|---|---|---|
| Roubaix SL8 geometry | 54 | 375 mm | RideDNA-derived |
| Roubaix SL8 geometry | 61 | 375 mm | RideDNA-derived |
| Roubaix SL8 geometry | 52 | 375 mm | RideDNA-derived |
| Roubaix SL8 geometry | 56 | 375 mm | RideDNA-derived |
| Roubaix SL8 geometry | 44 | 375 mm | RideDNA-derived |
| Roubaix SL8 geometry | 49 | 375 mm | RideDNA-derived |
| Roubaix SL8 geometry | 58 | 375 mm | RideDNA-derived |
What is the wheel flop of the Roubaix SL8?
Wheel flop is a calculated steering-geometry value based on trail and head tube angle. Also searched as flop.
| Configuration | Size | Wheel flop | Source |
|---|---|---|---|
| Roubaix SL8 geometry | 54 | 17.4 mm | RideDNA-derived |
| Roubaix SL8 geometry | 61 | 14.3 mm | RideDNA-derived |
| Roubaix SL8 geometry | 52 | 18 mm | RideDNA-derived |
| Roubaix SL8 geometry | 56 | 15.6 mm | RideDNA-derived |
| Roubaix SL8 geometry | 44 | 24.5 mm | RideDNA-derived |
| Roubaix SL8 geometry | 49 | 20 mm | RideDNA-derived |
| Roubaix SL8 geometry | 58 | 15.6 mm | RideDNA-derived |
Geometry
Available sizes: 54, 61, 52, 56, 44, 49, 58.
Roubaix SL8 geometry
Jump to size: 44 · 49 · 52 · 54 · 56 · 58 · 61
| Size | Reach | Stack | ETT | HTA | STA | Trail | Wheelbase | Chainstay | BB drop | BB height | Front center | Fork offset | Head tube | Seat tube | Standover | Fork length | Wheel flop | Max tire |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 44 | 369.9 mm | 496.6 mm | 503 mm | 69.3 ° | 75 ° | — | 993.2 mm | 410.3 mm | — | 263 mm | 588.4 mm | 52 mm | 90 mm | 365 mm | 661 mm | 375 mm | 24.5 mm | — |
| 49 | 379 mm | 502 mm | 523 mm | 70.8 ° | 74 ° | — | 991.3 mm | 410.3 mm | — | 263 mm | 586.6 mm | 52 mm | 90 mm | 410 mm | 684.6 mm | 375 mm | 20 mm | — |
| 52 | 385.3 mm | 518.7 mm | 534 mm | 71.5 ° | 74 ° | — | 989.3 mm | 410.3 mm | — | 263 mm | 592.3 mm | 52 mm | 105 mm | 445 mm | 709.8 mm | 375 mm | 18 mm | — |
| 54 | 396 mm | 537.2 mm | 550 mm | 72.3 ° | 74 ° | — | 1004.5 mm | 412.7 mm | — | 265 mm | 597 mm | 47 mm | 122 mm | 465 mm | 730.7 mm | 375 mm | 17.4 mm | — |
| 56 | 404.1 mm | 556.8 mm | 569 mm | 73 ° | 73.5 ° | — | 1012.3 mm | 412.7 mm | — | 265 mm | 604.7 mm | 47 mm | 140 mm | 485 mm | 749.5 mm | 375 mm | 15.6 mm | — |
| 58 | 411.1 mm | 583.5 mm | 584 mm | 73 ° | 73.5 ° | — | 1030.6 mm | 415.7 mm | — | 265 mm | 619.8 mm | 47 mm | 168 mm | 505 mm | 772.5 mm | 375 mm | 15.6 mm | — |
| 61 | 417 mm | 617.9 mm | 600 mm | 73.5 ° | 73.5 ° | — | 1041.7 mm | 415.7 mm | — | 265 mm | 630.8 mm | 47 mm | 202 mm | 545 mm | 808.9 mm | 375 mm | 14.3 mm | — |
Length measurements are in millimeters; HTA and STA are in degrees. ETT means effective top tube.
Size-to-size changes
Differences are calculated from the recorded values; they are not fit recommendations.
- Roubaix SL8 geometry: 44 → 49 — Reach +9.1 mm, Stack +5.4 mm, ETT +20 mm, HTA +1.5 °, STA -1 °, Wheelbase -1.9 mm, Chainstay +0 mm, BB height +0 mm, Front center -1.8 mm, Fork offset +0 mm, Head tube +0 mm, Seat tube +45 mm, Standover +23.6 mm, Fork length +0 mm, Wheel flop -4.5 mm
- Roubaix SL8 geometry: 49 → 52 — Reach +6.3 mm, Stack +16.7 mm, ETT +11 mm, HTA +0.7 °, STA +0 °, Wheelbase -2 mm, Chainstay +0 mm, BB height +0 mm, Front center +5.7 mm, Fork offset +0 mm, Head tube +15 mm, Seat tube +35 mm, Standover +25.2 mm, Fork length +0 mm, Wheel flop -2 mm
- Roubaix SL8 geometry: 52 → 54 — Reach +10.7 mm, Stack +18.5 mm, ETT +16 mm, HTA +0.8 °, STA +0 °, Wheelbase +15.2 mm, Chainstay +2.4 mm, BB height +2 mm, Front center +4.7 mm, Fork offset -5 mm, Head tube +17 mm, Seat tube +20 mm, Standover +20.9 mm, Fork length +0 mm, Wheel flop -0.6 mm
- Roubaix SL8 geometry: 54 → 56 — Reach +8.1 mm, Stack +19.6 mm, ETT +19 mm, HTA +0.7 °, STA -0.5 °, Wheelbase +7.8 mm, Chainstay +0 mm, BB height +0 mm, Front center +7.7 mm, Fork offset +0 mm, Head tube +18 mm, Seat tube +20 mm, Standover +18.8 mm, Fork length +0 mm, Wheel flop -1.8 mm
- Roubaix SL8 geometry: 56 → 58 — Reach +7 mm, Stack +26.7 mm, ETT +15 mm, HTA +0 °, STA +0 °, Wheelbase +18.3 mm, Chainstay +3 mm, BB height +0 mm, Front center +15.1 mm, Fork offset +0 mm, Head tube +28 mm, Seat tube +20 mm, Standover +23 mm, Fork length +0 mm, Wheel flop +0 mm
- Roubaix SL8 geometry: 58 → 61 — Reach +5.9 mm, Stack +34.4 mm, ETT +16 mm, HTA +0.5 °, STA +0 °, Wheelbase +11.1 mm, Chainstay +0 mm, BB height +0 mm, Front center +11 mm, Fork offset +0 mm, Head tube +34 mm, Seat tube +40 mm, Standover +36.4 mm, Fork length +0 mm, Wheel flop -1.3 mm
RideDNA-derived values
These deterministic calculations use the recorded manufacturer inputs above. They are separate from manufacturer facts and are not fit recommendations.
- Roubaix SL8 geometry size 54 stack Reach Ratio: 1.36
- Roubaix SL8 geometry size 61 stack Reach Ratio: 1.48
- Roubaix SL8 geometry size 52 stack Reach Ratio: 1.35
- Roubaix SL8 geometry size 56 stack Reach Ratio: 1.38
- Roubaix SL8 geometry size 44 stack Reach Ratio: 1.34
- Roubaix SL8 geometry size 49 stack Reach Ratio: 1.32
- Roubaix SL8 geometry size 58 stack Reach Ratio: 1.42
Bike details
- competitor Model Id
- ce945fbe-fc92-4989-a0e9-4456d7252ff7